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FMI (V)B42L Benutzerhandbuch

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109036-01M
7
Figure 8 - Lineal Gain
Hemmed 
End
8" Stainless 
Inner Pipe
12 
3
/
8
" 
Galvanized 
Outer Pipe
Figure 7 - Outside Air Kit
Secure to Collars with Metal Tape, Screws 
or Straps (Min. of 1/4" x 20" in size)
Air Inlet 
Location 
Must Allow 
For Bushes 
or Snow
Vent Hood 
Required for 
Wall Installation
Air Inlet 
Eyebrow
Vented Crawl Space 
(Check Local Codes 
Before Installing in a 
Vented Crawl Space)
VENTING INSTALLATION
OPTIONAL OUTSIDE AIR KIT 
(MODEL AK4/AK4F)
Installation of outside air kit should be per-
formed during rough framing of fireplace due 
to the nature of it's location. Outside combus-
tion air is accessed through a vented crawl 
space  (AK4F)  or  through  a  sidewall  (AK4). 
See Figure 24 on page 15 for instruction of 
operating air kit.
 CAUTION: Combustion air 
inlet ducts shall not terminate 
in attic space.
The  maximum  height  for  the 
air vent can not exceed 3 feet 
below the flue gas outlet of the 
termination.
CHIMNEY PIPE
FMI  PRODUCTS,  LLC  chimney  system 
consists of 12", 18", 24", 36" and 48" snap-
lock,  double-wall  pipe  segments,  planned 
for  maximum  adaptability  to  individual  site 
requirements. Actual lengths gained after fit-
ting overlaps must be taken into consideration 
(lineal gain) and are given in lineal gain chart 
(see Figure 8).
Lineal gain is actual measurable length of a 
part after two or more parts are connected.
 WARNING: The opening in 
collar around chimney at top of 
fireplace must not be obstructed. 
Never use blown insulation to fill 
chimney enclosure.
LINEAL GAIN
PART NO.
DESCRIPTION
GAIN
36"
Fireplace
37 
1
/
2
"
12-8DM
12-8HT
Pipe Section
10 
5
/
8
"
18-8DM
18-8HT
Pipe Section
16 
5
/
8
"
24-8DM
24-8HT
Pipe Section
23 
5
/
8
"
36-8DM
36-8HT
Pipe Section
34 
5
/
8
"
48-8DM
48-8HT
Pipe Section
46 
5
/
8
"
RT-8DM
Round Termination
6 
7
/
8
"*
RTL-8DM
Round Termination
7 
3
/
4
"*
RLT-8DM
Round Termination
7 
1
/
2
"*
RTT-8DM
Round Termination 
with Slip Section
6 
7
/
8
" to 
23 
1
/
8
"*
RTTL-8DM Round Termination 
with Slip Section
8 
1
/
2
" to  
21 
1
/
2
"*
RLTT-8DM Round Termination 
with Slip Section
7 
1
/
2
" to  
21 
1
/
4
"*
ET-8DM
Square Chase-Top
12"*
ETO-8DM
Square Chase-Top 
with Mesh
12"*
ETL-8DM
Square Chase-Top 
with Slip Section
7" to 15"*
ETLO-8DM
Square Chase-Top 
with Mesh & Slip 
Section
12" to  
25 
1
/
2
"*
* The lineal gain for the terminations is 
measured to the flue gas outlet height.